268 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



total length, but it is given as 6.5 mm., or 24 per cent of the total 

 length. It is stated that the ovaries are 2.25 mm. in length, or 8.3 

 per cent of the length of animal, but in the drawing they measure 

 10.8 per cent, which is equivalent to 2.92 mm. The maximum width 

 of body ("y compris la largeur des nageoires") is given as 2.5 mm., 

 or 9.3 per cent of the length of animal, but in the drawing it measures 

 11.5 per cent, which is equivalent to 3.1 mm. Finally, it is stated 

 that the lateral fin occupies "17/27 [63 per centl de la longeur totale 

 de 1' animal," that it extends 5.5 mm. anterior to the ventral ganglion 

 or "a environ 3 millimetres de Fextremite du corps," but in the 

 drawing it measures 68.4 per cent of the total length of animal and 

 extends only 10.8 per cent, or 2.92 mm., anterior to the ventral 

 ganglion. 



Although these discrepancies are, for the most part, small, they 

 make it impossible to depend with certainty upon either the descrip- 

 tions or the drawing, and whether E. richardi is or is not synonymous 

 with E. Tiamata must remain undecided until the type is more accu- 

 rately described. In spite of this uncertainty there are several 

 points that indicate its validity: 



1. The seizing jaws (pi. 37, fig. 26) are more massive than those of 

 E. Jiamata and their points are quite dissimilar. In E. Tiamata the 

 points are always sickle-shaped (pi. 37, fig. 27), although they are 

 not usually curved so much as in the Philippine material; the top 

 of shaft and base of point converge upon approaching the edge of 

 the jaw; the point has an oval base; and the pulp-canal is central 

 and sparsely filled with pulp. In E. richardi, on the other hand, the 

 points are not sickle-shaped; the top of shaft and base of point are 

 parallel; the point has an irregular rather than an oval base; the 

 pulp-canal is irregular in outline and is displaced toward the back 

 of shaft; and the pulp is evenly distributed. 



2. The body of E. richardi is between two and three times wider 

 in proportion to the length of animal than is the case with E. hamata. 



3. Lateral fins extend to, but rarely beyond, anterior end of 

 ventral ganglion in E. hamata, while in E. richardi they extend 

 beyond the anterior end of ganglion by 6 to 11 per cent of the length 

 of animal. 



4. Lateral fins in E. hamata with "fin-rays extending about as far 

 in front of the septum as the fin does behind it, but the fin continued 

 forwards as an expansion of the epidermis up to or to the middle of 

 the ventral ganglion." [Fowler (1905, p. 74).] In E. richardi the 

 fin, according to Germain and Joubin, is delicately rayed throughout, 

 the rays making an acute angle with the body as illustrated by their 

 drawing. This seems to be true of the Philippine specimens (pi. 36, 

 fig. 10), although the rays are fewer and much finer toward the 

 anterior end. 



