542 



2. Microdeutopus danmoniensis, (Sp. Bate). 



(PI. 192, fig. 1). 



Lembos danmoniensis, Sp. Bate, Brit. Ass. Eep. 1855, p. 58. 

 Syn: Microdeutopus gryllotalpa, Sp. Bate (not Costa). 



Very like the preceding species, as to the outer appearance, but of 

 smaller size. Cephalon nearly as long as the first 2 segments of mesosome 

 combined, lateral corners rather produced, and somewhat obliquely deflexed. 

 Coxal plates nearly as in M. anomalus. Last pair of epimeral plates of 

 metasome scarcely at all produced at the lateral corners. Eyes rounded oval, 

 and a little larger than in the said species. Superior antennse somewhat 

 exceeding half the length of the body, peduncle as in M. anomalus, flagellum 

 but little longer than the peduncle, and composed of about 16 articulations, 

 accessory appendage comparatively small, scarcely longer than the last 

 peduncular joint, and biarticulate. Inferior antennse scarcely differing in 

 structure from those in the preceding species. Anterior gnathopoda in female 

 somewhat less slender than in M. anomalus, and having the propodos consider- 

 ably longer than the carpus; those in male somewhat resembling the same 

 legs in the male of M. anomalus, but having the carpal projection shorter, 

 with the secondary tooth removed from its base, and the propodos less deeply 

 excavated below. Posterior gnathopoda in the 2 sexes scarcely differing from 

 those in the preceding species. Last pair of pereiopoda less elongated, 

 scarcely exceeding half the length of the body. Uropoda and telson of the 

 usual structure. Body whitish mottled with dark brown. Length of adult 

 male scarcely exceeding 5 mm. 



Remarks. The validity of this species might perhaps be questioned, 

 since it comes so very near to the preceding form, its distinguishing charac- 

 teristics appearing merely as signs of imperfect development. Having, however, 

 collected numerous specimens, both males and females, the latter with fully 

 developed incubatory pouch, and having found all the specimens to agree 

 exactly in the characteristics mentioned above, I am induced to regard this 

 form as in fact specifically distinct. It is only quite recently, after the 

 plate was printed, that I have become aware of the identity of this form 

 with the species described by Sp. Bate as M. gryllotalpa, and formerly recorded 

 by the same author as Lembos danmoniensis. In the plate, therefore, it is 

 noted as a new species, with the name M. propinqvus. In addition to its 

 greatly inferior size, it may be distinguished from the preceding species by the 



