12 THE NAUTILUS. 



trifles as that H. clavl/ormis Martens, 1897, was described and figured 

 as H. elizabethce as long ago as May, 1889, from specimens taken at 

 the same locality, or that species published from Mexico in 1896 are 

 not mentioned. 



The peculiar group Epirobia Strebel is made a subgenus of Holo- 

 spira. Whether this rank is or is not correct, may fairly be held a 

 matter of opinion ; but that von Martens errs radically in including 

 all of the Mexican " Cylindrella " in Epirobia is not a matter of 

 opinion but of fact. The true Epirobia species have teeth consider- 

 ably like Holospira correllated with a hollow shell axis (as in 

 Holospira and Ccelocentrum'); and here belong apiostoma, polygyra, 

 polygyrellit, and, perhaps, some others. Other continental species, 

 such as bourguignatiana, morini, speluncce, subtilis, have the entirely 

 different dentition of the slender Antillean species of Cylindrella, 

 such as those of the Caribbean Islands, correllated with a, solid shell 

 axis, and unquestionably belong to a widely different genus. 



The only species left in " Cylindrella" by von Martens is C 

 bourguignatiana Ancey, of which he says " unknown to me," cur- 

 iously forgetting to cite the figures of it published in 1891, although 

 the paper which these figures illustrate is freely quoted in the earlier 

 parts of the Biologia. Want of inclination as well as lack of space 

 forbids allusion to numerous other infelicities in the text ; and it is a 

 pleasure to say that the plates are superb examples of lithography. 



It cannot but be a matter of serious regret to conchologists inter- 

 ested in Mexican and Central American land snails that the later 

 parts of this great work fail to sustain the high standard of the earlier, 

 and that they fall short of what all have learned to expect from 

 their brilliant and eminent author. H. A. P. 



ON THE ANATOMY OF Apera Burnupi, E. A. SMITH, by Walter 

 E. Collinge, (Ann. Mag. N. H., Aug., 1 897). The detailed anatomy 

 of this South African Testacelloid slug is prefaced by a resume of 

 the history of the genus, which was originally established by Bin- 

 ney under the preoccupied name Chlamydophorus. The pedal (sub- 

 oral) gland, as usual in Agnatha, is very large. The genital system 

 is rather simple, with very short vas deferens hardly differentiated 

 from the slender penis, and the spermatheca is large and of peculiar 

 form. The genus is held to be nearer to Testacella than to Schizo- 

 glossa of the Rhytididse ; but while this is probably correct, it is 

 difficult to form an estimate of its affinities without some knowledge 

 of the muscular system, kidney, etc. 



