156 



THE VOYAGE OF H.M.S. CHALLENGER. 



being readily distinguishable by the following characters : — Loligo o^eynaudii has sharp- 

 pointed teeth in the suckers of the sessile arms, while in Loligo hohiensis they are 

 blunt and closely set. The papillate character of the margins of the tentacular suckers in 

 the latter species is a very remarkable character; it recalls the meridional grooves abeady 

 described in the suckers of certain species of Sepia (see p. 124) ; and may be a parallel 

 phenomenon with the fringes which are seen in Loligo vulgaris from the Mediterranean. 

 The left ventral arm has a number of spermatophores attached to it (fig. 4a), but 

 there are none on the spermatic pad. 



Loligo indica, Pfefi"er (PL XXVI). 



1884. Loligo indica, Pffr., Ceph. Hamb. Mus., p. 4, fig. 3, 3a. 



Habitat. — Station 188, Arafura Sea, south of Papua, September 10, 1874; 

 lat. 9° 59' S., long. 139° 42' E.; 28 fathoms; green mud. One specimen, $ . 



Station 190, also in the Arafura Sea, south of Papua, September 12, 1874 ; 

 lat. 8° 56' S., long. 136° 5' E.; 49 fathoms; green mud. 

 Twelve specimens, 8 ^ , 4 ? . 

 Java (Pfeffer). 



I had little doubt that the Challenger specimens 

 were to be referred to the same species as the one 

 which Dr. Pfefi'er has obtained from Java, but to place 

 the matter beyond question, I sent him a copy of the 

 drawings which are here published with the request that 

 he would compare it with his types. His reply was that 

 both certainly belonged to the same species, the sole 

 difference being that the fins are a little shorter in the 

 Hamburg specimens. 



This species is certainly very near to Loligo duvau- 

 celii, d'Orbigny, differing in the number of teeth in the 

 suckers and in the greater slenderness of the pen. Dr. 

 Pfeffer having given merely an outline of the body and 

 pen, I have devoted a plate to the full illustration of 

 the species. 



FIO. S.-Lolu,o indica: outlines of nine ^^^''^ ^^^"^^ ^ ^^^^^ ^^^^'^^^ °^ SpecimCUS in the 



TlTt^:^tfi'^o^vo^^°^lKoly. collection of very varying sizes, the mode in which the 



outline of the body varies with increasing growth was 

 brought forcibly before me. The accompanying cut, which shows the outlines of nine 

 individuals, proves conclusively that the growth is most rapid at the posterior end of the 



